When you want to turn a simple salad into a substantial dish, adding quinoa is the answer. Its delicate flavor takes well to leafy greens and light dressings. Toasting the grains in a dry skillet before cooking, adds a rich, nutty flavor.
In medium saucepan, bring vegetable broth to a boil. Add quinoa and salt if desired. Reduce heat to low, cover and cook until quinoa is tender and liquid is absorbed, about 15 minutes. Remove from heat and set aside to cool.
Meanwhile, make dressing: In food processor or blender, combine garlic, mustard, lemon juice, mint, goat cheese or tofu and yogurt, and process until smooth. With motor running, add oil in a thin, steady stream until well blended. Season with salt and pepper.
In large bowl, combine lettuce, tomatoes, cucumber and onions. Add quinoa, and toss to mix. Serve dressing on the side.